#1
25th September 2012, 08:07 PM
 ntsikelelo Join Date: Sep 2012 Posts: 2

# Where to get study tips for N2?

any one who have study tips for N2? email them to [email protected] please

#2
18th August 2015, 11:49 AM
 BHANBHORI Senior Member+++++ Join Date: Apr 2015 Posts: 11,617 Re: Where to get study tips for N2?

Here you can get the study tips for N2 as given below::::::::::::>>>>>>>>
• Solving the Numerical questions with accuracy as well as quickly is asked in most of the competitive, entrance and qualifying examinations.
• To solve them quickly you should practice more and more.

==> Short tricks to solve Numerical problems
1. 1 + 2 + 3 + 4 + 5 +  + n = n(n + 1)/2
2. (13 + 23 + 33 + ..... + n3) = (n(n + 1)/ 2)2
3. (12 + 22 + 32 + ..... + n2) = n ( n + 1 ) (2n + 1) / 6
4. Sum of first n odd numbers = n2
5. Sum of first n even numbers = n (n + 1)
6. (a + b)n = an + (nC1)an-1b + (nC2)an-2b2 +  + (nCn-1)abn-1 + bn
7. (a - b)2 = (a2 + b2 - 2ab)
8. (a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca)
9. (a3 + b3) = (a + b)(a2 - ab + b2)
Do you have any question? or have anything to say?